Studies on 4-Thiazolidinones: Scope of the Reactions of 3-Aryl-2-thioxo-1,3-thiazolidin-4-ones with Cyanide and Cyanate Ions
作者:Mohamed T. Omar、Mohamed E. Shaban、Nadia K. El-Aasar、Khaled F. Saied
DOI:10.1002/hlca.200890159
日期:2008.8
3-diones 6 along with each of the preceding products. Treatment of the respective (E,Z)-5-(2-aryl-2-oxoethylidene) analogues 3b and 3c with CN− gave 4b and 4c and 2-(arylcarbonyl)-2-methoxy-4-oxopentanedinitriles 7b and 7c, in addition to 3,6-bis[2-(4-chlorophenyl)-1-methoxy-2-oxoethylidene]-1,4-dithiane-2,5-dione 8c, which has been generated from 3c. Reactions of 3c or 3d with NCO− provided 5c or 5d,
的治疗3-芳基-2-硫代-1,3-噻唑烷-4-酮1与CN -和NCO -实现的环切割提供[(cyanocarbonothioyl)氨基]苯4和arylisothiocyanates 5,分别。对5-(2-芳基-2-氧代乙基)衍生物2进行类似处理,得到2,4-双(2-芳基-2-氧代亚乙基)环丁烷-1,3-二酮6以及每种前述产物。相应(处理E,Z)-5-(2-芳基-2-氧代亚乙基)类似物图3b和3c中与CN - ,得到图4b和4c中除了3,6-双[2-(2-(4-氯苯基)-1-甲氧基-2-氧代亚乙基] -1,4-二噻吩基-)之外,还包括2-(芳基羰基)-2-甲氧基-4-氧戊二烯腈7b和7c。由3c生成的2,5-dione 8c。的反应3C或3D与NCO -提供图5c或5d的与,一起8C或8D为纯的异构体。在MeO产物7和8的形成中,溶剂(MeOH)参与了。这些产品的结构基于微观分析和光谱数据。给出了上述转换的合理化。